____ aid in the coordination of the activities of adjacent animal cells.

____ aid in the coordination of the activities of adjacent animal cells.

A) Plasmodesmata
B) Desmosomes
C) Tight junctions
D) Keratin fibers
E) Gap (communicating) junctions


Answer: E

The primary role of _____ is to bind animal cells together.

The primary role of _____ is to bind animal cells together.

A) tight junctions
B) the cytoskeleton
C) plasmodesmata
D) gap (communicating) junctions
E) desmosomes


Answer: E) The primary role of desmosomes (anchoring junctions) is to bind cells together

Which of these cell junctions form a barrier to the passage of materials?

Which of these cell junctions form a barrier to the passage of materials?

A) desmosomes (anchoring junctions)
B) gap (communicating) junctions
C) plasmodesmata
D) keratin fibers
E) tight junctions


Answer: E) Tight junctions form a barrier that prevents fluids from moving between cells.

Which structure is not part of the endomembrane system?

Which structure is not part of the endomembrane system?

A) plasma membrane
B) chloroplast
C) Golgi apparatus
D) nuclear envelope
E) ER


Answer: B

Which of these organelles produces H2O2 as a by-product?

Which of these organelles produces H2O2 as a by-product?

A) peroxisome
B) centrioles
C) nucleus
D) flagellum
E) mitochondrion


Answer: A) Peroxisomes produce hydrogen peroxide as a by-product of their metabolic processes

____ is/are identical in structure to centrioles.

____ is/are identical in structure to centrioles.

A) Mitochondria
B) Nuclear envelopes
C) Basal bodies
D) Microfilaments
E) Chromatin


Answer: C) Basal bodies and centrioles have identical structures.